Beyond any shadow of a doubt, my opinion falls squarely with...
CORBON PowRBall 9mm +P (100 grain @ 1,400fps+) !
This fantastic round, unlike most other popular SD Ammo, like the tried n' true Speer Gold Dot 9mm +P 124 grain (for example), will not over-penetrate and therefore it "DUMPS" all of its energy inside the BG...and it makes one hell-of-a-huge "wound channel" that is ragged jagged, voluminous and complex since the jacket separates and goes helter skelter thru soft tissue like a meat grinder...plus it feeds with 100% Reliability.
Unless you intend on shooting through car doors (which will probably land you in prison if the BG is fleeing and you shoot at his fleeing vehicle), I say, "You don't need no stinkin' heavy grain rounds" (said like a Mexican Cartel Kingpin).
Haz ps. a Deputy Sheriff I know who has witness the aftermath of a few BG's being shot with PowRBall ammo said, "When we rolled the BG over onto his belly, he looked like he had a few big warts on his back from the PowRBall ammo that stopped its path, just short of exiting the BG's body".